Wall-ventilating duct.



C. C. SHIPP.

WALL VENTILATING DUCT. APPLICATION FlLD MAR. I. ma.

1 04,321. Patented Nov. 7, 1916.

n'rrokxvlsre,

eerie...

. l I l E i CLARENCE C. SHIPP, OF INDIANAPOLIS, INDIANA.

WALL-VENTILATING DUCT.

Application filed March 1, 1916.

To all whom it may concern Be it known that I, CLARENCE C. SHIPP, acitizen of the United States, residing at Indianapolis, in the county ofMarion and State of Indiana, have invented certain new and usefulImprovements in VVall-Ventilating Ducts, of which the following is aspecification.

This invention relates to a wall ventilating duct; and the object of theinvention consists in the provision of a duct of the above characterwhich will be simple in construction, efficient in operation and cheapto manufacture.

I accomplish the objects of the invention by means of the constructionillustrated in the accompanying drawings, forming a part hereof, inwhich- Figure 1 is a fragmentary detail sectional view of a buildingwall, showing my ventilating duct in operative position in the wall, theduct communicating with a steam radiator shield. Fig. 2 is a crosssection of the duct, on a considerably enlarged scale, showing theintegral formation of damper stops. Fig. 3 is a fragmentary detailsectional view on the line 33 in Fig. 2. Fig. 4 is a fragmentary detailperspective view of an interior corner of the duct, showing the integraldamper stops. Fig. 5 is a per spective view of a complete duct, showingthe arrangement of the seams along the line of the damper stops.

Referring to the drawings, the duct comprises a top member 10, bottommember 11 and end members 12 and 13 which are secured together to form ahollow duct the contour of which is disclosed best in Fig. 5. This ductis placed into the wall 15 of a building and communicates with theinterior of a conventional style of radiator shield 16 so that airfromwithout the building can be admitted when desired. The duct is generallyoff-set as at 17 to provide room for a timber 18 for securing thebaseboard across the duct. The movement of air through the duct iscontrolled by means of a damper 20 which is preferably composed of feltin order to effectually close the passageway through the duct when thedamper is down. The damper 20 may be operated from the room by means ofthe shifting-rod 21 which passes through a slot in the support 22, andby means of suitably Specification of Letters Patent.

Patented Nov. *7, 1916.

Serial No. 81,421.

arranged notches 23 in rod 21 which engage the edge of the slot insupport 22 the damper may be held in a position to limit the size of theopening through the duct. Felt 20 of the damper is rigidly held betweentwo metal sheets 25 and 26, in which sheet 25 is hingedly secured to aplate 28 which extends parallel with the damper. Examining Fig. 3 itwill be noted that felt 20 of the damper extends past the joint formedby the hinge between sheet 25 and plate 28. and to permit the felt tomove freely back and forth when the damper is rocked on its hinge, theplate 28 is mounted in advance of the wall of the duct by means of astrip 30 which will impart the desired clearance for the felt. Screws 29securely hold plate 28 and strip 30 in place against the wall of theduct.

It is desirable that the damper rest against a firm stop when down andthese stops heretofore have usually been formed independently of theduct and then soldered in place along the internal surface of the duct.This construction of the damper stops has been both diflicult andcostly, and the stops when soldered fast are apt to become loose. Toobviate the above difiiculty and to not only cheapen the constructionbut to make a more substantial damper stop, I form the stops integrallywith the bottom member 11 and end members 12 and 13. This I accomplishby giving the above members a reverse bend along the lines 35 (see Fig.5) by which the shoulders 36 are a formed. The arrangement of theshoulders 36 clearly shown in Fig. 1 of the drawings. The shoulders thusformed are rigid and can not be displaced, and eliminates all cutting ofmetal in the formation of the individual strips for the stops, and allthe work accompanying the soldering of the strips in place. Theshoulders 36 also hold the members 11, 12 and 13 straight and true byimparting rigidity to said members. The construction of the stops is sosimple that further description is deemed unnecessary.

Having thus fully described my said invention, what I desire to secureby Letters Patent, is

1. A wall ventilating duct, square in cross section, having an formed bybending the metal of the duct inturned valve-seat inwardly and thenceoutwardly, and a damper valve hinged in said duct, said damper valvebeing composed of pliable material adapted to rest upon said valve-seatand close the opening through said duct.

2. A wall ventilating duct, square in cross section, having an inturnedvalve-seat formed by bending the metal of the duct inwardly and thenceoutwardly, a damper valve hinged to said duct, said damper valve beingcomposed of pliable material adapted to rest upon said valve-seat andhaving a loose portion extending past the damper hinge at all positionsof the damper.

3. A wall ventilating duct, square in cross section, having an inturnedvalve-seat formed by bending the metal of the duct inwardly and thenceoutwardly, the bottom member of which is transversely oblique to thebottom of the duct, and the continuing side members of which are.longitudinally oblique to all members of the duct, and all membersarranged in a single plane.

4:. A wall ventilating duct, square in cross section, having an inturnedvalve-seat formed by bending the metal of the duct inwardly and thenceoutwardly, the bottom member of which is transversely oblique to thebottom of the duct, and the continuing side members of which arelongitudinally oblique to all members of the duct and all membersarranged in a single plane, and a pliable damper valve hinged to saidduct and adapted to contact said valve-seat and effectually close theopening through said duct.

In witness whereof, I have hereunto set my hand and seal atIndianapolis, Indiana, this 25th day of February, A. D. one thou sandnine hundred and sixteen.

CLARENCE o. sHIPP. 1,. s.]

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patent; Washington, D. C.

